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The BITSAVERS.ORG Documents Library: National Semiconductor

National Semiconductor was an American semiconductor manufacturer, that specialized in analog devices and subsystems, formerly headquartered in Santa Clara, California, USA. The products of National Semiconductor included power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions. National's key markets included wireless handsets, displays and a variety of broad electronics markets, including medical, automotive, industrial, and test and measurement applications. On September 23, 2011, the company formally became part of Texas Instruments as the "Silicon Valley" division.

National Semiconductor was founded in Danbury, Connecticut by Dr. Bernard J Rothlein on May 27, 1959, when he and seven colleagues left their employment at the semiconductor division of Sperry Rand Corporation.

The founding of the new company was followed by Sperry Rand filing a lawsuit against National Semiconductor for patent infringement. By 1965, as it was reaching the courts, the preliminaries of the lawsuit had caused the stock value of National to be depressed. The depressed stock values allowed Peter J Sprague to invest heavily in the company with Sprague's family funds. Sprague also relied on further financial backing from a pair of west coast investment firms and a New York underwriter to take control as the Chairman of National Semiconductor. At that time Sprague was 27 years old. Jeffrey S Young characterised the era as the beginning of venture capitalism.

That same year National Semiconductor acquired Molectro. Molectro was founded in 1962, in Santa Clara, California by J. Nall and D. Spittlehouse, who were formerly employed at Fairchild Camera and Instrument Corporation. The acquisition also brought to National Semiconductor two experts in linear semiconductor technologies, Dave Talbert and Robert Widlar, who were also formerly employed at Fairchild. The acquisition of Molectro provided National with the technology to launch itself in the fabrication and manufacture of monolithic integrated circuits.

In 1967 Sprague hired five top executives away from Fairchild, among whom were Charles E Sporck and Pierre Lamond. At the time of Sporck's hiring, Robert Noyce was defacto head of semiconductor operations at Fairchild and Sporck was his operations manager.

Charles E Sporck was appointed President and CEO of National. To make the deal better for Sporck's hiring and appointment for half his former salary at Fairchild, Sporck was alloted a substantial share of National's stock. In essence, Sporck took four of his personnel from Fairchild with him as well as three others from TI, Perkin-Elmer and Hewlett Packard to form a new eight man team at National Semiconductor. Incidentally, Sporck had been Widlar's superior at Fairchild before Widlar left Fairchild to join Molectro due to a compensation dispute with Sporck.

In 1968, National shifted its headquarters from Danbury, Connecticut to Santa Clara, California. However, not unlike many companies, for legal and financial expediency, National retained its registration as a Delaware corporation. Over the years they acquired several companies like Fairchild Semiconductor (in 1987), and Cyrix (in 1997). However, over time National Semiconductor spun off these acquisitions. Fairchild Semiconductor became a separate company again in 1997, the Cyrix microprocessors division was sold to VIA Technologies of Taiwan in 1999.

From 1997 to 2002 National enjoyed a large amount of publicity and awards with the development of the Cyrix Media Center, Cyrix WebPad, WebPad Metro and National Origami PDA concept devices created by National's Conceptual Products Group. Based largely on the success of the WebPad National formed the Information Appliance division (highly integrated processors & "internet gadgets") in 1998. The Information Appliance Division was sold to AMD in 2003. Other business like digital wireless chipsets, image sensors, PC I/O chipsets have also been recently closed down or sold off as National has reincarnated itself as a high performance analog semiconductor company.

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From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1977 MOS LSI databook
Topics: display, output, input, vss, key, voltage, mode, logical, vdd, high level, logical high, low level,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: imp16 :: IMP-16 srcListings
Topics: jmp, jsr, rts, skne, boc, aisz, error, skg, rcpy, shl, skne jmp, jsr jmp, jsr jsr, aisz jmp, skg...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1972 National MOS Integrated Circuits
Topics: input, output, data, clock, logic, voltage, temperature, mos, mhz, logical, power supply, data...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1986 NS32000 dataBook
Topics: data, address, cpu, memory, byte, bus, figure, mode, interrupt, slave processor, functional...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1988 Data Communications Local Area Networks UARTs Handbook
Topics: data, interrupt, receiver, byte, input, dma, address, output, remote, remote dma, modem status,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1993 Local Area Networks
Topics: data, address, bus, transmit, packet, buffer, receive, byte, dma, remote dma, byte count, shared...
From the bitsavers.org collection, a scanned-in computer-related document. national :: imp :: listing :: IMP-16 srcListings
Topics: jmp, jsr, rts, skne, boc, aisz, error, skg, word, rcpy, jsr jmp, jsr error, char ptr, input char,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1976 National TTL Databook
Topics: output, input, level, vcc, max, voltage, current, low, outputs, propagation, level output, low...
From the bitsavers.org collection, a scanned-in computer-related document. national :: pace :: 4200127X logDesTTLMar76
Topics: aco, contents, input, interrupt, count, data, subroutine, program, stack, memory location, initial...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0641
Topics: data, command, bcp, ibm, interrupt, interface, routine, memory, irma, smart alec, system unit, data...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1987 Microcommunications Elements Data Book
Topics: data, interrupt, set, reset, cpu, modem, output, input, mode, modem status, status register, memory...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0741
Topics: concentrator, smt, slave, concentrators, ports, fddi, port, mac, path, device, national...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-1081
Topics: outputs, flyback, circuit, design, semiconductor, windings, output, inductor, rms, nichicon,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-1001
Topics: loop, filter, phase, frequency, pll, khz, synthesizer, semiconductor, vco, figure, loop filter,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0413 Disk Interface Design Guide and Users Manual Jan86
Topics: data, ddc, header, disk, byte, dma, sector, operation, ecc, read gate, byte count, address mark,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: imp16 :: 4200002B IMP16 pgmg Nov73
Topics: instruction, program, address, operand, assembler, contents, flag, coding, memory, operation...
From the bitsavers.org collection, a scanned-in computer-related document. national :: imp16 :: 4200037A IMP16P UM V2 Sep74
Topics: memory, interface, control, panel, diagram, data, enable, tty, control panel, interface card,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: pace :: 4200078A paceTechDescrJun75
Topics: pace, data, address, memory, control, ttl, interrupt, signal, contents, output, pace application,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0733
Topics: pin, sram, propagation, address, eprom, output, semiconductor, delay, inactive, wait, propagation...
From the bitsavers.org collection, a scanned-in computer-related document. national :: pace :: 420305292-001A paceSysRef
Topics: pace, data, interrupt, contents, address, instruction, memory, signal, disp, interrupt enable, data...
From the bitsavers.org collection, a scanned-in computer-related document. national :: pace :: figFORTH PACE shrt1pg May79
Topics: pace, head, semis, jmp, docol, assembler, nucleus, dup, byte, dictionary, pace assembler, pace...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0550
Topics: interrupt, null, abs, byte, hpc, rel, upi, cpu, lcd, command, abs null, rel null, upi port, port...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0127
Topics: output, voltage, current, circuit, power, supply, figure, amplifier, input, high, power supply,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: imp16 :: 4200021C IMP16C App Jan74
Topics: data, memory, contents, interrupt, flag, instruction, control, address, jmp, control panel, control...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0681
Topics: mouse, rrc, noisex, sbit, byte, noisey, microsoft, ret, rbit, input, mouse systems, national...
From the bitsavers.org collection, a scanned-in computer-related document. national :: pace :: 4200130A paceAssembler
Topics: instruction, program, contents, data, interrupt, macro, stack, directive, address, source...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0868
Topics: printf, unsigned, hpc, void, char, semiconductor, status, byte, reset, data, national...
From the bitsavers.org collection, a scanned-in computer-related document. national :: scmp :: 420305365-001A SCMP-II Microprocessor Retrofit Kit Jan77
Topics: microprocessor, kit, retrofit, chip, retrofitted, cpu, crystal, changes, retrofitting, pin,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-1106
Topics: mac, txen, repeater, semiconductor, uart, signal, schematics, ncx, module, bus, national...
From the bitsavers.org collection, a scanned-in computer-related document. national :: imp16 :: 4210006A ROMDI ROMDIX Apr74
Topics: jmp, boc, error, aisz, jhp, skne, selx, test, feoo, semiconductor, jmp error, national...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0031
Topics: amplifier, voltage, input, semiconductor, current, integrator, vout, inverting, offset, impedance,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1989 Mass Storage Handbook :: 1989 Mass Storage Handbook 09
Topics: data, ddc, header, disk, byte, sector, dma, operation, ecc, read gate, byte count, header byte,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0181
Topics: output, regulator, current, voltage, adjustment, figure, regulators, circuitry, protection, limit,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0486
Topics: pop, hpc, exponent, semiconductor, push, step, nop, floating, jul, flp, floating point, national...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0069
Topics: figure, input, output, circuit, impedance, voltage, frequency, dissipation, gain, power, output...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataSheets :: FIPS dataSheet
Topics: ram, output, data, input, rom, program, memory, cpu, instruction, lines, program memory, data bus,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0935
Topics: pump, semiconductor, loop, charge, filter, voltage, corrective, figure, voltages, programming,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0225
Topics: thermocouple, temperature, error, voltage, output, seebeck, circuit, drift, adjust, linear, output...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0162
Topics: input, voltage, output, figure, frequency, pin, capacitor, speed, current, resistor, charge pump,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: scmp :: 4200113A SCMP Kit Users Manual Mar76
Topics: kitbug, kit, ldi, program, tty, memory, xppc, command, xpah, xpal, printed circuit, circuit board,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0210
Topics: frequency, pll, figure, khz, output, loop, converter, vfc, trace, circuit, national semiconductor,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0270
Topics: mov, equ, cursor, mvi, jmp, row, ret, crow, lxi, dcx, wrap arround, lhld crow, jmp addr, addr high,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0173
Topics: zener, voltage, reference, output, semiconductor, current, biasing, figure, impedance, dynamic,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: scmp :: 4200079A SCMP Technical Description Jan76
Topics: contents, data, address, instruction, byte, accumulator, memory, disp, pointer, pointer register,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0813
Topics: amplifiers, amplifier, capacitive, input, bandwidth, figure, response, pulse, feedback, output,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0714
Topics: motor, timer, step, semiconductor, stepper, jsr, ret, cmd, speed, rbit, national semiconductor,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0715
Topics: semiconductor, national, circuit, feedback, voltages, optocoupler, support, devices, circuitry,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1982 National Transistors Databook
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-1082
Topics: frequency, switching, semiconductor, regulator, voltage, sync, national, pin, boost, resistor,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0346
Topics: input, preamplifier, frequency, figure, noise, riaa, crossover, gain, khz, distortion, input noise,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0372
Topics: pulse, width, cext, timing, output, device, data, vcc, capacitor, figure, pulse width, output...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataSheets :: RALU dataSheet
Topics: ralu, logic, input, flags, status, contents, data, output, carry, stack, status flags, flags...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0076
Topics: mos, output, clock, figure, input, ttl, pulse, capacitance, voltage, current, pulse width, fall...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0072
Topics: input, voltage, amplifier, output, figure, current, circuit, biasing, gain, filter, output voltage,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: db32016 :: 420306440-001b TDS UM Dec84
Topics: command, user, tds, data, contents, program, error, memory, text, mmu, user program, parallel...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0255
Topics: spectral, random, density, function, equation, fourier, variance, probability, transform,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0905
Topics: microstrip, scale, impedance, stripline, slide, capacitance, propagation, dielectric, intrinsic,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0843
Topics: repeater, hub, network, port, management, ric, leric, software, interface, repeaters, network...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataBooks :: 1989 Mass Storage Handbook :: 1989 Mass Storage Handbook 05
Topics: data, phase, separator, disk, drive, filter, pll, controller, command, data separator, data rate,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0674
Topics: figure, signal, voltage, impedance, output, ecl, termination, current, ground, input, rise time,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0967
Topics: current, localtalk, differential, driver, frequency, semiconductor, receiver, supply, output,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-1044
Topics: interrupt, watchdog, timer, ram, clock, external, oscillator, user, idle, general purpose, econ...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0293
Topics: output, voltage, semiconductor, circuit, high, current, figure, scanner, frequency, resistor, high...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0071
Topics: amplifier, voltage, input, output, current, slew, figure, circuit, frequency, resistor, slew rate,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0516
Topics: interrupt, twinax, data, bcp, receiver, address, transceiver, cboo, cpu, serial data, receiver...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0966
Topics: termination, magnetics, utp, twisted, stp, semiconductor, layer, atm, twister, signal, twisted...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0272
Topics: output, booster, circuit, figure, current, amplifier, gain, khz, voltage, feedback, national...
From the bitsavers.org collection, a scanned-in computer-related document. national :: pace :: PACE Data Sheet 1975
Topics: interrupt, data, pace, instruction, clock, contents, flag, memory, program, input, interrupt...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0147
Topics: semiconductor, khz, toko, input, amplifier, stereo, tone, harmonic, thd, distortion, national...
From the bitsavers.org collection, a scanned-in computer-related document. national :: dataSheets :: SCMP dataSheet
Topics: instruction, data, output, input, address, status, contents, logic, breq, status register, pointer...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0552
Topics: abs, null, byte, eeprom, timer, rel, microwire, interrupt, rbit, jmpl, abs null, rel null, abs...
From the bitsavers.org collection, a scanned-in computer-related document. national :: db32016 :: 420310111-01A DB32016 Mar84
Topics: port, multibus, ram, jumper, address, data, cpu, bus, serial, interrupt, dual port, serial port,...
From the bitsavers.org collection, a scanned-in computer-related document. national :: imp16 :: 4200025B IMP16 Utils Mar74
Topics: command, genldr, memory, teletype, program, user, debug, rlm, promp, hexadecimal, top sector, base...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-1073
Topics: slio, mode, data, eeprom, configuration, identifier, interrupt, pin, figure, bus mode, slio...
From the bitsavers.org collection, a scanned-in computer-related document. national :: appNotes :: AN-0842
Topics: ethernet, interface, address, eprom, prom, reset, semiconductor, pin, enable, aui, twisted pair,...